Step 1:
The flower papers are 6x6 inches and darker on the backside. The leaf papers are 3x3 inches.

Step 6:
Fold both edges together.

Step 5:
Fold along the edge.

Step 2:
Fold in half two times, then unfold

Step 4:
Fold these two spots together.

Step 3:
Fold in half two times in this direction. Unfold the second fold only.

Step 10:
Fold over the prefolded lines, start with the two lines at the bottom right. Work in the direction of the two arrows.

Step 8:
Prefold, then unfold the model.

Step 9:
Fold the five edges in half 1,2 or 3 times, see purple lines as example. Then fold the model into a pentagon shape over the prefolded lines.

Step 7:
Fold in half along the edge

Step 16:
Fold the edge in half.

Step 15:
Fold over the prefolded lines.

Step 12:
Fold the tip upwards.

Step 11:
Prefold over these two lines.

Step 14:
Pull / fold this flap upwards.

Step 13:
Press the model flat.
Repeat steps 11 to 13 on the backside.

Step 21:
Curve the petals and open the center.

Step 19:
Squash-fold the next petal.

Step 20:
Squash-fold the other three petals.

Step 18:
Squash-fold the petal.

Step 17:
Fold the other four same edges in half too.

Step 22:
Make about 20 flowers

Step 28:
Make about 20 leafs.

Step 25:
Fold the left part in half.

Step 26:
Fold a pleat / midrib on the right part and curve it.

Step 24:
Fold over these three lines.

Step 23:
Prefold the leaf paper in half and fold over the two outer lines

Step 29:
I made this large paper by glueing a few normal papers together. It's enhanced with normal white papers and florist- / metal wire.
Roll up into a large tube shape.

Step 27:
Press the right part a little more flat, if necessary

Step 30:
The upper part of the stem is pressed / twisted together.

Step 31:
This is the bottom of the stem and shows the florist wire.

Step 32:
The upper part of the stem is bended into random directions.

Step 33:
The four smaller branches are made the same way,
rolled up and twisted into a more compact shape.
Using metal- / florist wire is not really necessary for the branches.

Step 35:
The arrow shows where I glued a branche to the large main stem. Glue the other three branches to the main stem and then the remaining flowers and leafs to the upper part of the tree.

Step 34:
Here a branche is bended into random directions.